/*   The MIT License
 *   
 *   Carina Engine
 *   Copyright (c) 2009 2010 2011 2012 Zdravko Velinov
 *   
 *   Permission is hereby granted, free of charge, to any person obtaining a copy
 *   of this software and associated documentation files (the "Software"), to deal
 *   in the Software without restriction, including without limitation the rights
 *   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *   copies of the Software, and to permit persons to whom the Software is
 *   furnished to do so, subject to the following conditions:
 *
 *   The above copyright notice and this permission notice shall be included in
 *   all copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *   THE SOFTWARE.
 */

#include "carina/renderer-base.hh"
#include "carina/graphics-engine.hh"

namespace Carina
{
struct PostProcessingPass
{
    ShaderProgramPtr        program;
    TextureVarPtr           input_texture;

    PostProcessingPass(const ShaderProgramPtr& prog, const TextureVarPtr& inptex)
        :   program(prog),
            input_texture(inptex) {}
};

class PostProcessing
{
    RendererPtr                 m_Renderer;
    FramebufferPtr              m_Framebuffers[2];
    TexturePtr                  m_Textures[2];

    typedef DataVector<PostProcessingPass> PostProcessingPasses;
    PostProcessingPasses        m_PostProcPass;

    StateObjectPtr              m_State;
    BlendStateObjectPtr         m_BlendState;
    DepthStencilStateObjectPtr  m_DepthStencilState;
public:
    PostProcessing(const GraphicsEngineContextPtr& ce_ctx);
    PostProcessing(const RendererPtr& renderer, size_t width, size_t height);
    ~PostProcessing();

    void setupFramebuffer();
    
    void registerPostProcProgram(const PostProcessingPass& post_proc);

    void resize(size_t width, size_t height);

    void postProcess();
};

typedef shared_ptr<PostProcessing> PostProcessingPtr;
}